15 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Sullivan township | 1 | 6,140 | 6,282 | -0.37% | 103 | 59.45 | Township |
| Sullivan | 2 | 4,184 | 4,403 | -1.04% | 1,511 | 2.77 | City |
| Lowe township | 3 | 1,789 | 1,740 | 0.96% | 44 | 40.61 | Township |
| Marrowbone township | 4 | 1,548 | 1,606 | -0.58% | 40 | 39.01 | Township |
| Lovington township | 5 | 1,514 | 1,557 | -0.46% | 29 | 52.46 | Township |
| Bethany | 6 | 1,174 | 1,251 | -1.26% | 1,202 | 0.98 | Village |
| Jonathan Creek township | 7 | 1,030 | 1,019 | -0.29% | 28 | 36.77 | Township |
| Lovington | 8 | 998 | 1,062 | -1.29% | 1,835 | 0.54 | Village |
| East Nelson township | 9 | 994 | 987 | -0.1% | 28 | 35.89 | Township |
| Dora township | 10 | 674 | 696 | -0.59% | 19 | 35.05 | Township |
| Sullivan township | 11 | 629 | 653 | -0.94% | 15 | 41.28 | Township |
| Whitley township | 12 | 587 | 594 | -0.51% | 16 | 36.72 | Township |
| Dalton City | 13 | 427 | 456 | -1.39% | 800 | 0.53 | Village |
| Gays | 14 | 208 | 223 | -1.42% | 539 | 0.39 | Village |
| LaPlace | 15 | 122 | 128 | -6.87% | 187 | 0.65 | CDP |
Sullivan township is the largest city in Moultrie County, with a population of 6,140.
LaPlace is the smallest city in Moultrie County.
There are 15 cities in Moultrie County, Illinois.